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Python 3.3.3

Warning: Python 3.3.3 reached end-of-life on 2017-09-29. It is no longer supported and does not receive security updates. We recommend upgrading to the latest Python release.
Note: Python 3.3.3 has been superseded by Python 3.3.7.

Release date: Nov. 17, 2013

fixes several security issues and various other bugs found in Python 3.3.2.

This release fully supports OS X 10.9 Mavericks. In particular, this release fixes an issue that could cause previous versions of Python to crash when typing in interactive mode on OS X 10.9.

Major new features of the 3.3 series, compared to 3.2

Python 3.3 includes a range of improvements of the 3.x series, as well as easier porting between 2.x and 3.x.

  • PEP 380, syntax for delegating to a subgenerator (yield from)
  • PEP 393, flexible string representation (doing away with the distinction between "wide" and "narrow" Unicode builds)
  • A C implementation of the "decimal" module, with up to 120x speedup for decimal-heavy applications
  • The import system (__import__) is based on importlib by default
  • The new "lzma" module with LZMA/XZ support
  • PEP 397, a Python launcher for Windows
  • PEP 405, virtual environment support in core
  • PEP 420, namespace package support
  • PEP 3151, reworking the OS and IO exception hierarchy
  • PEP 3155, qualified name for classes and functions
  • PEP 409, suppressing exception context
  • PEP 414, explicit Unicode literals to help with porting
  • PEP 418, extended platform-independent clocks in the "time" module
  • PEP 412, a new key-sharing dictionary implementation that significantly saves memory for object-oriented code
  • PEP 362, the function-signature object
  • The new "faulthandler" module that helps diagnosing crashes
  • The new "unittest.mock" module
  • The new "ipaddress" module
  • The "sys.implementation" attribute
  • A policy framework for the email package, with a provisional (see PEP 411) policy that adds much improved unicode support for email header parsing
  • A "collections.ChainMap" class for linking mappings to a single unit
  • Wrappers for many more POSIX functions in the "os" and "signal" modules, as well as other useful functions such as "sendfile()"
  • Hash randomization, introduced in earlier bugfix releases, is now switched on by default

More resources

Download

This is a production release. Please report any bugs you encounter.

We currently support these formats for download:

The source tarballs are signed with Georg Brandl's key, which has a key id of 36580288; the fingerprint is 26DE A9D4 6133 91EF 3E25 C9FF 0A5B 1018 3658 0288. The Windows installer was signed by Martin von Löwis' public key, which has a key id of 7D9DC8D2. The Mac installers were signed with Ned Deily's key, which has a key id of 6F5E1540. The public keys are located on the download page.

MD5 checksums and sizes of the released files:

831d59212568dc12c95df222865d3441  16808057  Python-3.3.3.tgz
f3ebe34d4d8695bf889279b54673e10c  14122529  Python-3.3.3.tar.bz2
4ca001c5586eb0744e3174bc75c6fba8  12057744  Python-3.3.3.tar.xz
60f44c22bbd00fbf3f63d98ef761295b  19876666  python-3.3.3-macosx10.5.dmg
3f7b6c1dc58d7e0b5282f3b7a2e00ef7  19956580  python-3.3.3-macosx10.6.dmg
3fc2925746372ab8401dfabce278d418  27034152  python-3.3.3-pdb.zip
8af44d33ea3a1528fc56b3a362924500  22145398  python-3.3.3.amd64-pdb.zip
8de52d1e2e4bbb3419b7f40bdf48e855  21086208  python-3.3.3.amd64.msi
ab6a031aeca66507e4c8697ff93a0007  20537344  python-3.3.3.msi
c86d6d68ca1a1de7395601a4918314f9   6651185  python333.chm
[1]The binaries for AMD64 will also work on processors that implement the Intel 64 architecture (formerly EM64T), i.e. the architecture that Microsoft calls x64, and AMD called x86-64 before calling it AMD64. They will not work on Intel Itanium Processors (formerly IA-64).
[2](1, 2) There is important information about IDLE, Tkinter, and Tcl/Tk on Mac OS X here.

Full Changelog

Files

Version Operating System Description MD5 Checksum SHA256 Checksum File Size GPG
Gzipped source tarball Source release a44bec5d1391b1af654cf15e25c282f2 n/a 65.9 MB SIG
XZ compressed source tarball Source release 4ca001c5586eb0744e3174bc75c6fba8 n/a 11.5 MB SIG
bzip2 compressed source tarball Source release f3ebe34d4d8695bf889279b54673e10c n/a 13.5 MB SIG
Mac OS X 32-bit i386/PPC installer macOS for Mac OS X 10.5 and later 60f44c22bbd00fbf3f63d98ef761295b n/a 19.0 MB SIG
Mac OS X 64-bit/32-bit installer macOS for Mac OS X 10.6 and later 3f7b6c1dc58d7e0b5282f3b7a2e00ef7 n/a 19.0 MB SIG
Windows help file Windows c86d6d68ca1a1de7395601a4918314f9 n/a 6.3 MB SIG
Windows debug information files Windows 3fc2925746372ab8401dfabce278d418 n/a 25.8 MB SIG
Windows x86 MSI installer Windows ab6a031aeca66507e4c8697ff93a0007 n/a 19.6 MB SIG
Windows x86-64 MSI installer Windows for AMD64/EM64T/x64 8de52d1e2e4bbb3419b7f40bdf48e855 n/a 20.1 MB SIG